/* * Copyright (C) 2016 Andreas Steffen * HSR Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. See . * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. */ #include "tpm_tss_tss2.h" #include "tpm_tss_tss2_names.h" #ifdef TSS_TSS2 #include #include #include #include #ifdef TSS2_TCTI_TABRMD #include #endif /* TSS2_TCTI_TABRMD */ #ifdef TSS2_TCTI_SOCKET #include #define TCTI_SOCKET_DEFAULT_ADDRESS "127.0.0.1" #define TCTI_SOCKET_DEFAULT_PORT 2323 #endif /* TSS2_TCTI_SOCKET */ #define LABEL "TPM 2.0 -" typedef struct private_tpm_tss_tss2_t private_tpm_tss_tss2_t; /** * Private data of an tpm_tss_tss2_t object. */ struct private_tpm_tss_tss2_t { /** * Public tpm_tss_tss2_t interface. */ tpm_tss_t public; /** * TCTI context */ TSS2_TCTI_CONTEXT *tcti_context; /** * SYS context */ TSS2_SYS_CONTEXT *sys_context; /** * Number of supported algorithms */ size_t supported_algs_count; /** * List of supported algorithms */ TPM_ALG_ID supported_algs[TPM_PT_ALGORITHM_SET]; }; /** * Some symbols required by libtctisocket */ FILE *outFp; uint8_t simulator = 1; int TpmClientPrintf (uint8_t type, const char *format, ...) { return 0; } /** * Convert hash algorithm to TPM_ALG_ID */ static TPM_ALG_ID hash_alg_to_tpm_alg_id(hash_algorithm_t alg) { switch (alg) { case HASH_SHA1: return TPM_ALG_SHA1; case HASH_SHA256: return TPM_ALG_SHA256; case HASH_SHA384: return TPM_ALG_SHA384; case HASH_SHA512: return TPM_ALG_SHA512; default: return TPM_ALG_ERROR; } } /** * Convert TPM_ALG_ID to hash algorithm */ static hash_algorithm_t hash_alg_from_tpm_alg_id(TPM_ALG_ID alg) { switch (alg) { case TPM_ALG_SHA1: return HASH_SHA1; case TPM_ALG_SHA256: return HASH_SHA256; case TPM_ALG_SHA384: return HASH_SHA384; case TPM_ALG_SHA512: return HASH_SHA512; default: return HASH_UNKNOWN; } } /** * Check if an algorithm given by its TPM_ALG_ID is supported by the TPM */ static bool is_supported_alg(private_tpm_tss_tss2_t *this, TPM_ALG_ID alg_id) { int i; if (alg_id == TPM_ALG_ERROR) { return FALSE; } for (i = 0; i < this->supported_algs_count; i++) { if (this->supported_algs[i] == alg_id) { return TRUE; } } return FALSE; } /** * Get a list of supported algorithms */ static bool get_algs_capability(private_tpm_tss_tss2_t *this) { TPMS_CAPABILITY_DATA cap_data; TPMS_TAGGED_PROPERTY tp; TPMI_YES_NO more_data; TPM_ALG_ID alg; uint32_t rval, i, offset, revision = 0, year = 0; size_t len = BUF_LEN; char buf[BUF_LEN], manufacturer[5], vendor_string[17]; char *pos = buf; int written; /* get fixed properties */ rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_TPM_PROPERTIES, PT_FIXED, MAX_TPM_PROPERTIES, &more_data, &cap_data, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_TPM_PROPERTIES: 0x%06x", LABEL, rval); return FALSE; } memset(manufacturer, '\0', sizeof(manufacturer)); memset(vendor_string, '\0', sizeof(vendor_string)); /* print fixed properties */ for (i = 0; i < cap_data.data.tpmProperties.count; i++) { tp = cap_data.data.tpmProperties.tpmProperty[i]; switch (tp.property) { case TPM_PT_REVISION: revision = tp.value; break; case TPM_PT_YEAR: year = tp.value; break; case TPM_PT_MANUFACTURER: htoun32(manufacturer, tp.value); break; case TPM_PT_VENDOR_STRING_1: case TPM_PT_VENDOR_STRING_2: case TPM_PT_VENDOR_STRING_3: case TPM_PT_VENDOR_STRING_4: offset = 4 * (tp.property - TPM_PT_VENDOR_STRING_1); htoun32(vendor_string + offset, tp.value); break; default: break; } } DBG2(DBG_PTS, "%s manufacturer: %s (%s) rev: %05.2f %u", LABEL, manufacturer, vendor_string, (float)revision/100, year); /* get supported algorithms */ rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_ALGS, 0, TPM_PT_ALGORITHM_SET, &more_data, &cap_data, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_ALGS: 0x%06x", LABEL, rval); return FALSE; } /* Number of supported algorithms */ this->supported_algs_count = cap_data.data.algorithms.count; /* store and print supported algorithms */ for (i = 0; i < this->supported_algs_count; i++) { alg = cap_data.data.algorithms.algProperties[i].alg; this->supported_algs[i] = alg; written = snprintf(pos, len, " %N", tpm_alg_id_names, alg); if (written < 0 || written >= len) { break; } pos += written; len -= written; } DBG2(DBG_PTS, "%s algorithms:%s", LABEL, buf); /* get supported ECC curves */ rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_ECC_CURVES, 0, TPM_PT_LOADED_CURVES, &more_data, &cap_data, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS, "%s GetCapability failed for TPM_ECC_CURVES: 0x%06x", LABEL, rval); return FALSE; } /* reset print buffer */ pos = buf; len = BUF_LEN; /* print supported ECC curves */ for (i = 0; i < cap_data.data.eccCurves.count; i++) { written = snprintf(pos, len, " %N", tpm_ecc_curve_names, cap_data.data.eccCurves.eccCurves[i]); if (written < 0 || written >= len) { break; } pos += written; len -= written; } DBG2(DBG_PTS, "%s ECC curves:%s", LABEL, buf); return TRUE; } /** * Initialize TSS2 TCTI TABRMD context */ static bool initialize_tcti_tabrmd_context(private_tpm_tss_tss2_t *this) { #ifdef TSS2_TCTI_TABRMD size_t tcti_context_size; uint32_t rval; /* determine size of tcti context */ rval = tss2_tcti_tabrmd_init(NULL, &tcti_context_size); if (rval != TSS2_RC_SUCCESS) { DBG1(DBG_PTS, "%s could not get tcti_context size: 0x%06x", LABEL, rval); return FALSE; } /* allocate memory for tcti context */ this->tcti_context = (TSS2_TCTI_CONTEXT*)malloc(tcti_context_size); /* initialize tcti context */ rval = tss2_tcti_tabrmd_init(this->tcti_context, &tcti_context_size); if (rval != TSS2_RC_SUCCESS) { DBG1(DBG_PTS, "%s could not get tcti_context: 0x%06x " "via tabrmd interface", LABEL, rval); return FALSE; } return TRUE; #else /* TSS2_TCTI_TABRMD */ return FALSE; #endif /* TSS2_TCTI_TABRMD */ } /** * Initialize TSS2 TCTI Socket context */ static bool initialize_tcti_socket_context(private_tpm_tss_tss2_t *this) { #ifdef TSS2_TCTI_SOCKET size_t tcti_context_size; uint32_t rval; TCTI_SOCKET_CONF rm_if_config = { TCTI_SOCKET_DEFAULT_ADDRESS, TCTI_SOCKET_DEFAULT_PORT }; /* determine size of tcti context */ rval = InitSocketTcti(NULL, &tcti_context_size, &rm_if_config, 0); if (rval != TSS2_RC_SUCCESS) { DBG1(DBG_PTS, "%s could not get tcti_context size: 0x%06x", LABEL, rval); return FALSE; } /* allocate memory for tcti context */ this->tcti_context = (TSS2_TCTI_CONTEXT*)malloc(tcti_context_size); /* initialize tcti context */ rval = InitSocketTcti(this->tcti_context, &tcti_context_size, &rm_if_config, 0); if (rval != TSS2_RC_SUCCESS) { DBG1(DBG_PTS, "%s could not get tcti_context: 0x%06x " "via socket interface", LABEL, rval); return FALSE; } return TRUE; #else /* TSS2_TCTI_SOCKET */ return FALSE; #endif /* TSS2_TCTI_SOCKET */ } /** * Initialize TSS2 Sys context */ static bool initialize_sys_context(private_tpm_tss_tss2_t *this) { uint32_t sys_context_size; uint32_t rval; TSS2_ABI_VERSION abi_version = { TSSWG_INTEROP, TSS_SAPI_FIRST_FAMILY, TSS_SAPI_FIRST_LEVEL, TSS_SAPI_FIRST_VERSION }; /* determine size of sys context */ sys_context_size = Tss2_Sys_GetContextSize(0); /* allocate memory for sys context */ this->sys_context = malloc(sys_context_size); /* initialize sys context */ rval = Tss2_Sys_Initialize(this->sys_context, sys_context_size, this->tcti_context, &abi_version); if (rval != TSS2_RC_SUCCESS) { DBG1(DBG_PTS, "%s could not get sys_context: 0x%06x", LABEL, rval); return FALSE; } /* get a list of supported algorithms and ECC curves */ return get_algs_capability(this); } /** * Finalize TSS context */ static void finalize_context(private_tpm_tss_tss2_t *this) { if (this->tcti_context) { tss2_tcti_finalize(this->tcti_context); free(this->tcti_context); } if (this->sys_context) { Tss2_Sys_Finalize(this->sys_context); free(this->sys_context); } } METHOD(tpm_tss_t, get_version, tpm_version_t, private_tpm_tss_tss2_t *this) { return TPM_VERSION_2_0; } METHOD(tpm_tss_t, get_version_info, chunk_t, private_tpm_tss_tss2_t *this) { return chunk_empty; } /** * read the public key portion of a TSS 2.0 AIK key from NVRAM */ bool read_public(private_tpm_tss_tss2_t *this, TPMI_DH_OBJECT handle, TPM2B_PUBLIC *public) { uint32_t rval; TPM2B_NAME name = { { sizeof(TPM2B_NAME)-2, } }; TPM2B_NAME qualified_name = { { sizeof(TPM2B_NAME)-2, } }; TPMS_AUTH_RESPONSE session_data; TSS2_SYS_RSP_AUTHS sessions_data; TPMS_AUTH_RESPONSE *session_data_array[1]; session_data_array[0] = &session_data; sessions_data.rspAuths = &session_data_array[0]; sessions_data.rspAuthsCount = 1; /* read public key for a given object handle from TPM 2.0 NVRAM */ rval = Tss2_Sys_ReadPublic(this->sys_context, handle, 0, public, &name, &qualified_name, &sessions_data); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS, "%s could not read public key from handle 0x%08x: 0x%06x", LABEL, handle, rval); return FALSE; } return TRUE; } METHOD(tpm_tss_t, generate_aik, bool, private_tpm_tss_tss2_t *this, chunk_t ca_modulus, chunk_t *aik_blob, chunk_t *aik_pubkey, chunk_t *identity_req) { return FALSE; } METHOD(tpm_tss_t, get_public, chunk_t, private_tpm_tss_tss2_t *this, uint32_t handle) { TPM2B_PUBLIC public = { { 0, } }; TPM_ALG_ID sig_alg, digest_alg; chunk_t aik_blob, aik_pubkey = chunk_empty; if (!read_public(this, handle, &public)) { return chunk_empty; } aik_blob = chunk_create((u_char*)&public, sizeof(public)); DBG3(DBG_LIB, "%s AIK public key blob: %B", LABEL, &aik_blob); /* convert TSS 2.0 AIK public key blot into PKCS#1 format */ switch (public.t.publicArea.type) { case TPM_ALG_RSA: { TPM2B_PUBLIC_KEY_RSA *rsa; TPMT_RSA_SCHEME *scheme; chunk_t aik_exponent, aik_modulus; scheme = &public.t.publicArea.parameters.rsaDetail.scheme; sig_alg = scheme->scheme; digest_alg = scheme->details.anySig.hashAlg; rsa = &public.t.publicArea.unique.rsa; aik_modulus = chunk_create(rsa->t.buffer, rsa->t.size); aik_exponent = chunk_from_chars(0x01, 0x00, 0x01); /* subjectPublicKeyInfo encoding of AIK RSA key */ if (!lib->encoding->encode(lib->encoding, PUBKEY_SPKI_ASN1_DER, NULL, &aik_pubkey, CRED_PART_RSA_MODULUS, aik_modulus, CRED_PART_RSA_PUB_EXP, aik_exponent, CRED_PART_END)) { DBG1(DBG_PTS, "%s subjectPublicKeyInfo encoding of AIK key " "failed", LABEL); return chunk_empty; } break; } case TPM_ALG_ECC: { TPMS_ECC_POINT *ecc; TPMT_ECC_SCHEME *scheme; chunk_t ecc_point; uint8_t *pos; scheme = &public.t.publicArea.parameters.eccDetail.scheme; sig_alg = scheme->scheme; digest_alg = scheme->details.anySig.hashAlg; ecc = &public.t.publicArea.unique.ecc; /* allocate space for bit string */ pos = asn1_build_object(&ecc_point, ASN1_BIT_STRING, 2 + ecc->x.t.size + ecc->y.t.size); /* bit string length is a multiple of octets */ *pos++ = 0x00; /* uncompressed ECC point format */ *pos++ = 0x04; /* copy x coordinate of ECC point */ memcpy(pos, ecc->x.t.buffer, ecc->x.t.size); pos += ecc->x.t.size; /* copy y coordinate of ECC point */ memcpy(pos, ecc->y.t.buffer, ecc->y.t.size); /* subjectPublicKeyInfo encoding of AIK ECC key */ aik_pubkey = asn1_wrap(ASN1_SEQUENCE, "mm", asn1_wrap(ASN1_SEQUENCE, "mm", asn1_build_known_oid(OID_EC_PUBLICKEY), asn1_build_known_oid(ecc->x.t.size == 32 ? OID_PRIME256V1 : OID_SECT384R1)), ecc_point); break; } default: DBG1(DBG_PTS, "%s unsupported AIK key type", LABEL); return chunk_empty; } DBG1(DBG_PTS, "AIK signature algorithm is %N with %N hash", tpm_alg_id_names, sig_alg, tpm_alg_id_names, digest_alg); return aik_pubkey; } /** * Configure a PCR Selection assuming a maximum of 24 registers */ static bool init_pcr_selection(private_tpm_tss_tss2_t *this, uint32_t pcrs, hash_algorithm_t alg, TPML_PCR_SELECTION *pcr_sel) { TPM_ALG_ID alg_id; uint32_t pcr; /* check if hash algorithm is supported by TPM */ alg_id = hash_alg_to_tpm_alg_id(alg); if (!is_supported_alg(this, alg_id)) { DBG1(DBG_PTS, "%s %N hash algorithm not supported by TPM", LABEL, hash_algorithm_short_names, alg); return FALSE; } /* initialize the PCR Selection structure,*/ pcr_sel->count = 1; pcr_sel->pcrSelections[0].hash = alg_id; pcr_sel->pcrSelections[0].sizeofSelect = 3; pcr_sel->pcrSelections[0].pcrSelect[0] = 0; pcr_sel->pcrSelections[0].pcrSelect[1] = 0; pcr_sel->pcrSelections[0].pcrSelect[2] = 0; /* set the selected PCRs */ for (pcr = 0; pcr < PLATFORM_PCR; pcr++) { if (pcrs & (1 << pcr)) { pcr_sel->pcrSelections[0].pcrSelect[pcr / 8] |= ( 1 << (pcr % 8) ); } } return TRUE; } METHOD(tpm_tss_t, read_pcr, bool, private_tpm_tss_tss2_t *this, uint32_t pcr_num, chunk_t *pcr_value, hash_algorithm_t alg) { TPML_PCR_SELECTION pcr_selection; TPML_DIGEST pcr_values; uint32_t pcr_update_counter, rval; uint8_t *pcr_value_ptr; size_t pcr_value_len; if (pcr_num >= PLATFORM_PCR) { DBG1(DBG_PTS, "%s maximum number of supported PCR is %d", LABEL, PLATFORM_PCR); return FALSE; } if (!init_pcr_selection(this, (1 << pcr_num), alg, &pcr_selection)) { return FALSE; } /* initialize the PCR Digest structure */ memset(&pcr_values, 0, sizeof(TPML_DIGEST)); /* read the PCR value */ rval = Tss2_Sys_PCR_Read(this->sys_context, 0, &pcr_selection, &pcr_update_counter, &pcr_selection, &pcr_values, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS, "%s PCR bank could not be read: 0x%60x", LABEL, rval); return FALSE; } pcr_value_ptr = (uint8_t *)pcr_values.digests[0].t.buffer; pcr_value_len = (size_t) pcr_values.digests[0].t.size; *pcr_value = chunk_clone(chunk_create(pcr_value_ptr, pcr_value_len)); return TRUE; } METHOD(tpm_tss_t, extend_pcr, bool, private_tpm_tss_tss2_t *this, uint32_t pcr_num, chunk_t *pcr_value, chunk_t data, hash_algorithm_t alg) { uint32_t rval; TPM_ALG_ID alg_id; TPML_DIGEST_VALUES digest_values; TPMS_AUTH_COMMAND session_data_cmd; TPMS_AUTH_RESPONSE session_data_rsp; TSS2_SYS_CMD_AUTHS sessions_data_cmd; TSS2_SYS_RSP_AUTHS sessions_data_rsp; TPMS_AUTH_COMMAND *session_data_cmd_array[1]; TPMS_AUTH_RESPONSE *session_data_rsp_array[1]; session_data_cmd_array[0] = &session_data_cmd; session_data_rsp_array[0] = &session_data_rsp; sessions_data_cmd.cmdAuths = &session_data_cmd_array[0]; sessions_data_rsp.rspAuths = &session_data_rsp_array[0]; sessions_data_cmd.cmdAuthsCount = 1; sessions_data_rsp.rspAuthsCount = 1; session_data_cmd.sessionHandle = TPM_RS_PW; session_data_cmd.hmac.t.size = 0; session_data_cmd.nonce.t.size = 0; *( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0; /* check if hash algorithm is supported by TPM */ alg_id = hash_alg_to_tpm_alg_id(alg); if (!is_supported_alg(this, alg_id)) { DBG1(DBG_PTS, "%s %N hash algorithm not supported by TPM", LABEL, hash_algorithm_short_names, alg); return FALSE; } digest_values.count = 1; digest_values.digests[0].hashAlg = alg_id; switch (alg) { case HASH_SHA1: if (data.len != HASH_SIZE_SHA1) { return FALSE; } memcpy(digest_values.digests[0].digest.sha1, data.ptr, HASH_SIZE_SHA1); break; case HASH_SHA256: if (data.len != HASH_SIZE_SHA256) { return FALSE; } memcpy(digest_values.digests[0].digest.sha256, data.ptr, HASH_SIZE_SHA256); break; case HASH_SHA384: if (data.len != HASH_SIZE_SHA384) { return FALSE; } memcpy(digest_values.digests[0].digest.sha384, data.ptr, HASH_SIZE_SHA384); break; case HASH_SHA512: if (data.len != HASH_SIZE_SHA512) { return FALSE; } memcpy(digest_values.digests[0].digest.sha512, data.ptr, HASH_SIZE_SHA512); break; default: return FALSE; } /* extend PCR */ rval = Tss2_Sys_PCR_Extend(this->sys_context, pcr_num, &sessions_data_cmd, &digest_values, &sessions_data_rsp); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS, "%s PCR %02u could not be extended: 0x%06x", LABEL, pcr_num, rval); return FALSE; } /* get updated PCR value */ return read_pcr(this, pcr_num, pcr_value, alg); } METHOD(tpm_tss_t, quote, bool, private_tpm_tss_tss2_t *this, uint32_t aik_handle, uint32_t pcr_sel, hash_algorithm_t alg, chunk_t data, tpm_quote_mode_t *quote_mode, tpm_tss_quote_info_t **quote_info, chunk_t *quote_sig) { chunk_t quoted_chunk, qualified_signer, extra_data, clock_info, firmware_version, pcr_select, pcr_digest; hash_algorithm_t pcr_digest_alg; bio_reader_t *reader; uint32_t rval; TPM2B_DATA qualifying_data; TPML_PCR_SELECTION pcr_selection; TPM2B_ATTEST quoted = { { sizeof(TPM2B_ATTEST)-2, } }; TPMT_SIG_SCHEME scheme; TPMT_SIGNATURE sig; TPMI_ALG_HASH hash_alg; TPMS_AUTH_COMMAND session_data_cmd; TPMS_AUTH_RESPONSE session_data_rsp; TSS2_SYS_CMD_AUTHS sessions_data_cmd; TSS2_SYS_RSP_AUTHS sessions_data_rsp; TPMS_AUTH_COMMAND *session_data_cmd_array[1]; TPMS_AUTH_RESPONSE *session_data_rsp_array[1]; session_data_cmd_array[0] = &session_data_cmd; session_data_rsp_array[0] = &session_data_rsp; sessions_data_cmd.cmdAuths = &session_data_cmd_array[0]; sessions_data_rsp.rspAuths = &session_data_rsp_array[0]; sessions_data_cmd.cmdAuthsCount = 1; sessions_data_rsp.rspAuthsCount = 1; session_data_cmd.sessionHandle = TPM_RS_PW; session_data_cmd.hmac.t.size = 0; session_data_cmd.nonce.t.size = 0; *( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0; qualifying_data.t.size = data.len; memcpy(qualifying_data.t.buffer, data.ptr, data.len); scheme.scheme = TPM_ALG_NULL; memset(&sig, 0x00, sizeof(sig)); /* set Quote mode */ *quote_mode = TPM_QUOTE_TPM2; if (!init_pcr_selection(this, pcr_sel, alg, &pcr_selection)) { return FALSE; } rval = Tss2_Sys_Quote(this->sys_context, aik_handle, &sessions_data_cmd, &qualifying_data, &scheme, &pcr_selection, "ed, &sig, &sessions_data_rsp); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_Quote failed: 0x%06x", LABEL, rval); return FALSE; } quoted_chunk = chunk_create(quoted.t.attestationData, quoted.t.size); reader = bio_reader_create(chunk_skip(quoted_chunk, 6)); if (!reader->read_data16(reader, &qualified_signer) || !reader->read_data16(reader, &extra_data) || !reader->read_data (reader, 17, &clock_info) || !reader->read_data (reader, 8, &firmware_version) || !reader->read_data (reader, 10, &pcr_select) || !reader->read_data16(reader, &pcr_digest)) { DBG1(DBG_PTS, "%s parsing of quoted struct failed", LABEL); reader->destroy(reader); return FALSE; } reader->destroy(reader); DBG2(DBG_PTS, "PCR Composite digest: %B", &pcr_digest); DBG2(DBG_PTS, "TPM Quote Info: %B", "ed_chunk); DBG2(DBG_PTS, "qualifiedSigner: %B", &qualified_signer); DBG2(DBG_PTS, "extraData: %B", &extra_data); DBG2(DBG_PTS, "clockInfo: %B", &clock_info); DBG2(DBG_PTS, "firmwareVersion: %B", &firmware_version); DBG2(DBG_PTS, "pcrSelect: %B", &pcr_select); /* extract signature */ switch (sig.sigAlg) { case TPM_ALG_RSASSA: case TPM_ALG_RSAPSS: *quote_sig = chunk_clone( chunk_create( sig.signature.rsassa.sig.t.buffer, sig.signature.rsassa.sig.t.size)); hash_alg = sig.signature.rsassa.hash; break; case TPM_ALG_ECDSA: case TPM_ALG_ECDAA: case TPM_ALG_SM2: case TPM_ALG_ECSCHNORR: *quote_sig = chunk_cat("cc", chunk_create( sig.signature.ecdsa.signatureR.t.buffer, sig.signature.ecdsa.signatureR.t.size), chunk_create( sig.signature.ecdsa.signatureS.t.buffer, sig.signature.ecdsa.signatureS.t.size)); hash_alg = sig.signature.ecdsa.hash; break; default: DBG1(DBG_PTS, "%s unsupported %N signature algorithm", LABEL, tpm_alg_id_names, sig.sigAlg); return FALSE; }; DBG2(DBG_PTS, "PCR digest algorithm is %N", tpm_alg_id_names, hash_alg); pcr_digest_alg = hash_alg_from_tpm_alg_id(hash_alg); DBG2(DBG_PTS, "TPM Quote Signature: %B", quote_sig); /* Create and initialize Quote Info object */ *quote_info = tpm_tss_quote_info_create(*quote_mode, pcr_digest_alg, pcr_digest); (*quote_info)->set_tpm2_info(*quote_info, qualified_signer, clock_info, pcr_select); (*quote_info)->set_version_info(*quote_info, firmware_version); return TRUE; } METHOD(tpm_tss_t, sign, bool, private_tpm_tss_tss2_t *this, uint32_t hierarchy, uint32_t handle, signature_scheme_t scheme, chunk_t data, chunk_t pin, chunk_t *signature) { key_type_t key_type; hash_algorithm_t hash_alg; uint32_t rval; TPM_ALG_ID alg_id; TPM2B_MAX_BUFFER buffer; TPM2B_DIGEST hash = { { sizeof(TPM2B_DIGEST)-2, } }; TPMT_TK_HASHCHECK validation; TPM2B_PUBLIC public = { { 0, } }; TPMT_SIG_SCHEME sig_scheme; TPMT_SIGNATURE sig; TPMS_AUTH_COMMAND session_data_cmd; TPMS_AUTH_RESPONSE session_data_rsp; TSS2_SYS_CMD_AUTHS sessions_data_cmd; TSS2_SYS_RSP_AUTHS sessions_data_rsp; TPMS_AUTH_COMMAND *session_data_cmd_array[1]; TPMS_AUTH_RESPONSE *session_data_rsp_array[1]; session_data_cmd_array[0] = &session_data_cmd; session_data_rsp_array[0] = &session_data_rsp; sessions_data_cmd.cmdAuths = &session_data_cmd_array[0]; sessions_data_rsp.rspAuths = &session_data_rsp_array[0]; sessions_data_cmd.cmdAuthsCount = 1; sessions_data_rsp.rspAuthsCount = 1; session_data_cmd.sessionHandle = TPM_RS_PW; session_data_cmd.nonce.t.size = 0; session_data_cmd.hmac.t.size = 0; if (pin.len > 0) { session_data_cmd.hmac.t.size = min(sizeof(session_data_cmd.hmac.t) - 2, pin.len); memcpy(session_data_cmd.hmac.t.buffer, pin.ptr, session_data_cmd.hmac.t.size); } *( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0; key_type = key_type_from_signature_scheme(scheme); hash_alg = hasher_from_signature_scheme(scheme, NULL); /* Check if hash algorithm is supported by TPM */ alg_id = hash_alg_to_tpm_alg_id(hash_alg); if (!is_supported_alg(this, alg_id)) { DBG1(DBG_PTS, "%s %N hash algorithm not supported by TPM", LABEL, hash_algorithm_short_names, hash_alg); return FALSE; } /* Get public key */ if (!read_public(this, handle, &public)) { return FALSE; } if (key_type == KEY_RSA && public.t.publicArea.type == TPM_ALG_RSA) { sig_scheme.scheme = TPM_ALG_RSASSA; sig_scheme.details.rsassa.hashAlg = alg_id; } else if (key_type == KEY_ECDSA && public.t.publicArea.type == TPM_ALG_ECC) { sig_scheme.scheme = TPM_ALG_ECDSA; sig_scheme.details.ecdsa.hashAlg = alg_id; } else { DBG1(DBG_PTS, "%s signature scheme %N not supported by TPM key", LABEL, signature_scheme_names, scheme); return FALSE; } if (data.len <= MAX_DIGEST_BUFFER) { memcpy(buffer.t.buffer, data.ptr, data.len); buffer.t.size = data.len; rval = Tss2_Sys_Hash(this->sys_context, 0, &buffer, alg_id, hierarchy, &hash, &validation, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_Hash failed: 0x%06x", LABEL, rval); return FALSE; } } else { TPMI_DH_OBJECT sequence_handle; TPM2B_AUTH null_auth; null_auth.t.size = 0; rval = Tss2_Sys_HashSequenceStart(this->sys_context, 0, &null_auth, alg_id, &sequence_handle, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_HashSequenceStart failed: 0x%06x", LABEL, rval); return FALSE; } while (data.len > 0) { buffer.t.size = min(data.len, MAX_DIGEST_BUFFER); memcpy(buffer.t.buffer, data.ptr, buffer.t.size); data.ptr += buffer.t.size; data.len -= buffer.t.size; rval = Tss2_Sys_SequenceUpdate(this->sys_context, sequence_handle, &sessions_data_cmd, &buffer, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_SequenceUpdate failed: 0x%06x", LABEL, rval); return FALSE; } } buffer.t.size = 0; rval = Tss2_Sys_SequenceComplete(this->sys_context, sequence_handle, &sessions_data_cmd, &buffer, hierarchy, &hash, &validation, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_SequenceComplete failed: 0x%06x", LABEL, rval); return FALSE; } } rval = Tss2_Sys_Sign(this->sys_context, handle, &sessions_data_cmd, &hash, &sig_scheme, &validation, &sig, &sessions_data_rsp); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_Sign failed: 0x%06x", LABEL, rval); return FALSE; } /* extract signature */ switch (scheme) { case SIGN_RSA_EMSA_PKCS1_SHA1: case SIGN_RSA_EMSA_PKCS1_SHA2_256: case SIGN_RSA_EMSA_PKCS1_SHA2_384: case SIGN_RSA_EMSA_PKCS1_SHA2_512: *signature = chunk_clone( chunk_create( sig.signature.rsassa.sig.t.buffer, sig.signature.rsassa.sig.t.size)); break; case SIGN_ECDSA_256: case SIGN_ECDSA_384: case SIGN_ECDSA_521: *signature = chunk_cat("cc", chunk_create( sig.signature.ecdsa.signatureR.t.buffer, sig.signature.ecdsa.signatureR.t.size), chunk_create( sig.signature.ecdsa.signatureS.t.buffer, sig.signature.ecdsa.signatureS.t.size)); break; case SIGN_ECDSA_WITH_SHA256_DER: case SIGN_ECDSA_WITH_SHA384_DER: case SIGN_ECDSA_WITH_SHA512_DER: *signature = asn1_wrap(ASN1_SEQUENCE, "mm", asn1_integer("c", chunk_create( sig.signature.ecdsa.signatureR.t.buffer, sig.signature.ecdsa.signatureR.t.size)), asn1_integer("c", chunk_create( sig.signature.ecdsa.signatureS.t.buffer, sig.signature.ecdsa.signatureS.t.size))); break; default: DBG1(DBG_PTS, "%s unsupported %N signature scheme", LABEL, signature_scheme_names, scheme); return FALSE; }; return TRUE; } METHOD(tpm_tss_t, get_random, bool, private_tpm_tss_tss2_t *this, size_t bytes, uint8_t *buffer) { size_t len, random_len= sizeof(TPM2B_DIGEST)-2; TPM2B_DIGEST random = { { random_len, } }; uint8_t *pos = buffer; uint32_t rval; while (bytes > 0) { len = min(bytes, random_len); rval = Tss2_Sys_GetRandom(this->sys_context, NULL, len, &random, NULL); if (rval != TSS2_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_GetRandom failed: 0x%06x", LABEL, rval); return FALSE; } memcpy(pos, random.t.buffer, random.t.size); pos += random.t.size; bytes -= random.t.size; } return TRUE; } METHOD(tpm_tss_t, get_data, bool, private_tpm_tss_tss2_t *this, uint32_t hierarchy, uint32_t handle, chunk_t pin, chunk_t *data) { uint16_t nv_size, nv_offset = 0; uint32_t rval; TPM2B_NAME nv_name = { { sizeof(TPM2B_NAME)-2, } }; TPM2B_NV_PUBLIC nv_public = { { 0, } }; TPM2B_MAX_NV_BUFFER nv_data = { { sizeof(TPM2B_MAX_NV_BUFFER)-2, } }; TPMS_AUTH_COMMAND session_data_cmd; TPMS_AUTH_RESPONSE session_data_rsp; TSS2_SYS_CMD_AUTHS sessions_data_cmd; TSS2_SYS_RSP_AUTHS sessions_data_rsp; TPMS_AUTH_COMMAND *session_data_cmd_array[1]; TPMS_AUTH_RESPONSE *session_data_rsp_array[1]; /* get size of NV object */ rval = Tss2_Sys_NV_ReadPublic(this->sys_context, handle, 0, &nv_public, &nv_name, 0); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_NV_ReadPublic failed: 0x%06x", LABEL, rval); return FALSE; } nv_size = nv_public.t.nvPublic.dataSize; *data = chunk_alloc(nv_size); /*prepare NV read session */ session_data_cmd_array[0] = &session_data_cmd; session_data_rsp_array[0] = &session_data_rsp; sessions_data_cmd.cmdAuths = &session_data_cmd_array[0]; sessions_data_rsp.rspAuths = &session_data_rsp_array[0]; sessions_data_cmd.cmdAuthsCount = 1; sessions_data_rsp.rspAuthsCount = 1; session_data_cmd.sessionHandle = TPM_RS_PW; session_data_cmd.nonce.t.size = 0; session_data_cmd.hmac.t.size = 0; if (pin.len > 0) { session_data_cmd.hmac.t.size = min(sizeof(session_data_cmd.hmac.t) - 2, pin.len); memcpy(session_data_cmd.hmac.t.buffer, pin.ptr, session_data_cmd.hmac.t.size); } *( (uint8_t *)((void *)&session_data_cmd.sessionAttributes ) ) = 0; /* read NV data an NV buffer block at a time */ while (nv_size > 0) { rval = Tss2_Sys_NV_Read(this->sys_context, hierarchy, handle, &sessions_data_cmd, min(nv_size, MAX_NV_BUFFER_SIZE), nv_offset, &nv_data, &sessions_data_rsp); if (rval != TPM_RC_SUCCESS) { DBG1(DBG_PTS,"%s Tss2_Sys_NV_Read failed: 0x%06x", LABEL, rval); chunk_free(data); return FALSE; } memcpy(data->ptr + nv_offset, nv_data.t.buffer, nv_data.t.size); nv_offset += nv_data.t.size; nv_size -= nv_data.t.size; } return TRUE; } METHOD(tpm_tss_t, destroy, void, private_tpm_tss_tss2_t *this) { finalize_context(this); free(this); } /** * See header */ tpm_tss_t *tpm_tss_tss2_create() { private_tpm_tss_tss2_t *this; bool available; INIT(this, .public = { .get_version = _get_version, .get_version_info = _get_version_info, .generate_aik = _generate_aik, .get_public = _get_public, .read_pcr = _read_pcr, .extend_pcr = _extend_pcr, .quote = _quote, .sign = _sign, .get_random = _get_random, .get_data = _get_data, .destroy = _destroy, }, ); available = initialize_tcti_tabrmd_context(this); if (!available) { available = initialize_tcti_socket_context(this); } if (available) { available = initialize_sys_context(this); } DBG1(DBG_PTS, "TPM 2.0 via TSS2 %savailable", available ? "" : "not "); if (!available) { destroy(this); return NULL; } return &this->public; } #else /* TSS_TSS2 */ tpm_tss_t *tpm_tss_tss2_create() { return NULL; } #endif /* TSS_TSS2 */